Hi, a big thank you to all who replied to my post, i have learnt a lot from this experience, here is what happened.

1. a web link was provided to e bay to buy a resistor.

2. I ordered it.

3. It was the wrong one although it says on the site it is for this car part number was 932 FD0240.

4. I called them up and they had 1 left in stock at heathrow area, drove and collected it.

5. came home friend fixed it in about 15 mins , said a prayer and presto i now have air con.

6.The part i got from GSF CAR PARTS AND EVEN ON THEIR E BAY SITE YOU WILL GET THE WRONG RESISTOR, the resistor pat you need is 932FO0250

This is of course if your resistor is on passenger side and blue in colour, the new one is black. They even took my car reg at GSF Heathrow and it still came up with the wrong part number which is 932FO0240.

But again thanks for all your help